Ok, shoot me, but what the hell is a " Mode 6 misfire test " ? LOL, What I used was our Snap on solus ultra. I go into Engine Data, then to Misfire data. Gives me all the cylinders in order, and list real time miss as well as miss history. I expected to see some misses, but had none in either. Back to the mode 6 test, I,m sure that's just a different term for the same thing we,ve been doing for years. But that's how we find the issue most of the time when were chasing a random miss. At that point it could be a coil, plug or injector, or worse a mechanical problem. What I need to do is put our IDS on it, and do a cylinder contribution test and see what that shows. Big thing with a cylinder con test is it will show a miss for anything, electrical or mechanical.